CERN Scientists Perfect Detection of Exotic Particle Decay in High-Energy Collisions
Physicists at the Large Hadron Collider have dramatically improved their ability to spot rare particles hidden in extreme collision events—a capability essential for discovering physics beyond current theory. The advance could accelerate the hunt for new particles and unlock secrets about the Higgs boson, reshaping the future of particle physics research.
Originaltitel: Performance of heavy-flavour jet identification in Lorentz-boosted topologies in proton-proton collisions at √(<em>s</em>) = 13 TeV
<p>Measurements in the highly Lorentz-boosted regime provoke increased interest in probing the Higgs boson properties and in searching for particles beyond the standard model at the LHC. In the CMS Collaboration, various boosted-object tagging algorithms, designed to identify hadronic jets originating from a massive particle decaying to bb̅ or cc̅, have been developed and deployed across a range of physics analyses. This paper highlights their performance on simulated events, and summarizes novel calibration techniques using proton-proton collision data collected at √(s) = 13 TeV during the 2016–2018 LHC data-taking period. Three dedicated methods are used for the calibration in multijet events, leveraging either machine learning techniques, the presence of muons within energetic boosted jets, or the reconstruction of hadronically decaying high-energy Z bosons. The calibration results, obtained through a combination of these approaches, are presented and discussed.</p>